17. Let's speak English in class every day. --->How 18. I suggest that you should work harder this semester. --->Why. 19. I suggest teaching these pupils very strictly. -->I suggest that 20. What about going to the pagoda this weekend? --->Let's 21. Let's help our grandfather in the garden. --->I think that 22. Why don't we do morning exercises? --->What 23. I suggest doing something to help the poor. --->Shall 24. Let's make posters on energy saving. (making) → I suggest 25. How about taking part in this activity? (should) --->I think 26. Shall we do morning exercises? (about) → What 27. Let's take a shower today. (take) --->I suggest that 28. Why don't we write sentences with new words? (we) --->Shall 29. I think we should go to her party this weekend. (going) --->How 30. I suggest travelling to Vung Tau by coach. (not) --->Why 31. I suggest doing something to help victim of flood in Hue. --->Shall 32. How about take part in this activity? --->I think 33. I suggest teaching these students strickly. --->Let's 34. Shall we go to the post office? → Let's 35. How about speaking English in class? --->Why